RESUMO
Objective To assess the value of ultrasound examination in transvaginal diagnosis of normal fetal heart with 11-14 weeks of gestation.Methods Totally 158 cases of normal fetal heart with high risk pregnancy and nuchal translucency thickness were examined by two ultrasoud approaches:transvaginal(TVS) and tranabdomina(TAS) in 11-14 weeks of gestation.Results The group of TVS was obviously clearer than TAS by displaying the normal fetal cardiac structural in 12 week of gestation and 13-14 weeks of gestation with significant difference between the two groups (P<0.05),respectively.No significant difference between the two groups in 11 week of gestation was observed.Conclusion The transvaginal echocardiogram is of clinical value in the high risk gravida during the late first and the early second trimester.